DR YESHAYAHU (JESAIAH) BEN-AHARON is a spiritual scientist, philosopher and social activist. In 1982, he founded the anthroposophical community at Kibbutz Harduf in Israel. Since 2009, he has headed the Global School of Spiritual Science. At the centre of his research is the development of human consciousness in philosophy, history, art, natural sciences and social life. He is the author of The Spiritual Event of the Twentieth Century; Cognitive Yoga; The Three Meetings; Jerusalem; The Twilight and Resurrection of Humanity; Spiritual Science in the 21st Century; The Event in Science, History, Philosophy & Art; The New Experience of the Supersensible; The Modern Christ Experience and the Knowledge Drama of the Second Coming, Volumes 1-4; America's Global Responsibility; Cognitive Yoga: How a Book is Born and The Time is at Hand!